Bloody Maria with Mini Slider Garnish

Name: Bloody Maria with Mini Slider Garnish
Ingredients: 6 ounces tequila; 1/2 teaspoon harissa paste; 12 ounces tomato juice; 2 ounces lime juice; 6 dashes Worcestershire sauce; 1 pinch celery salt; 1 tablespoon fresh grated horseradish; 1/2 teaspoon yellow onion, grated; Tabasco to taste; Mini Sliders, recipe follows, for garnish; 1 cup cherry tomatoes, halved; 1 teaspoon fresh grated horseradish; 1/2 teaspoon finely minced shallot; 1 teaspoon extra-virgin olive oil; Kosher salt and freshly ground black pepper; 8 ounces coarsely ground 20 percent fat ground beef; Clarified butter or canola oil; Four 2-inch-wide brioche slider buns, split; 1 tablespoon Dijon mustard; 4 paper-thin slices preserved lemon, seeds removed; 4 cornichons; 4 wooden skewers